Shuguang Electron Tube is a traditional tube manufactor and has rich experiences in producing any types of tubes. The advantage of shuguang electron tube is that they have stable and reliable quality management.
EL34 is pentode used in audio output,the anode limit power dissipation is 25W.The power output is over 10W for one tube when it used in class A1 audio amplifier.The power output is over 35W for two tubes when it used in class AB1 audio amplifier.EL34 has similar specification like 6CA7,they can be exchanged used directly.